Setts



(No Model.)

J. DAVIDSON & J. BANNISTER.

PIGKER CHECK FOR LOOMS. No. 399,656 Patented Mar. 19, 1889*.

lhvrrnn States Patent @rrrcn.

PlCKER-CHEC TTS.

K FUR LOOlVlS.

SPECIFICATION forming part of Letters Patent No. 399,656, dated March19, 1889.

Application filed December 1, 1888. Serial No. 292,433. (No model.)

To all whom it may concern/.-

Be it known that we, JAMES DAVIDSON, a subject of the Queen of GreatBritain, and Jesse BANNISTER, a citizen of the United States, residing,respectively, at New Bedford, in the county of Bristol and State ofMassachusetts, have jointly invented a new and useful Improvement inPicker-Checks for Looms, of which the following is a specification.

In buifers for looms or picker-checks which have heretofore been usedthe means employed to ease the sh uttlc to a stop has produced a recoilor rebound of the shuttle, and this rebound has had a tendency to breakthe thread and thereby cause trouble and waste.

The object of this invention is to produce a buffer for looms which willhave no recoil, and thereby obviate the breaking of the thread.

To this end our invention consists of a piv oted lever having a pawl toengage a ratchet and an arm to project under the lathe of a loom and inrear of the picker-stick, a ratchet and pulley mounted on the side ofthe lathe and actuated by said pawl, a strap orband attached to thelathe and passing around said pulley to produce by friction thenecessary resistance to the turning of said ratchet and pulley, and aspi ral spring attached to the lathe and to the end of the strap orband, by means of which the friction of the strap or band on the pulleyis regulated.

In the accompanying drawings, Figure l is a side elevation of a portionof a loom, showing a part of the'lathe, the picker-stick, tug-strap, androd, and our improved buffer secured to the side of the lathe. Fig. 1 isa detail view. Fig. 2 represents a side view of the buffer, showing theconstruction and arrangements of its parts.

a represents the lathe, to the side of which and near the endis fixedour improved buffer, which is composed of the flanged pulley 0, madeintegral with or firmly secured to the ratchet (Z, the lever e, carryingthe pawl f and having the arm g pivoted in such a manner that the pawl fwill take into the ratchet d that is to say, journaled on the same shaftwhich carries the ratchet and pulley, said shaft 0 having the plate 10,by means of which the whole device is secured to the side of the lathe,and the strap or band h, having one end secured to the stud m andwrapped around the pulley c, and the spiral spring 5, attached to thelathe and to the end of the strap h. In the end of the strap 71, next tothe spring 3, are holes, (see Fig. 1,) into which the end of the springmay be hooked, and thus the tension or friction of the strap on thepulley be regulated. The arm g projects under the lathe in such a manneras to cross the path which the pickerstick traverses.

It will be observed that the upper portion of the lever e,which carriesthe pawl f, projects from its pivotal point at about a right angle tothe lower portion of the same.

The operation of the device is as follows: The device being secured tothe side of the lathe and the strap 72 adjusted and secured as shown, itis obvious that when the picker-stick l) is given an impetus to throwthe shuttle and arrives at the position shown by the dotted lines 7',the lever 6 will of its own gravity assume the position shown in dottedlines, and the pawl f will also by gravity engage with the ratchet (1.When the picker-stick is thrown to the end of the lathe again andreceives the impact of the shuttle, it strikes the arm g and forces itto the rear, which 1notion,'by means of the pawl f, gives the ratchet dand the pulley c a partial revolution. The resistance necessary to easethe motion of the shuttle to a stop is furnished by the friction of thestrap h on the pulley c. This friction can be regulated to any desiredextent by means of holes in the end of the strap, into which the end ofthe spring .9 is hooked, so as to give a greater or less tension to thespring.

It will also be observed that when the shuttle is stopped by the bufferthere is no recoil or impulse to start it back again until it is givenby the pickenstick.

\Vhatwe claim, and desire to secure by Letters Patent, is

A buffer for looms, consisting of a lever carrying a pawl to engage aratchet and an arm to project under the lathe to receive the of thestrap, substantially as and for the purblOW of the picker-stick in itsbackward mopose shown and described. tion, a ratchet and pulley pivotedto the JAMES DAVIDSON.

lathe, With said pawl engaging the ratchet, a JESSE BANNISTER. strap orband attached to the lathe and Witnesses:

Wrapped around said pulley, and a spiral J. L. GILLINGHAM,

spring attached to the lathe and to the end H. W. MASON.

